Question

Im trying to get a regexp (in bash) to identify files with only the following extensions :
tgz, tar.gz, TGZ and TAR.GZ.
I tried several ones but cant get it to work.
Im using this regexp to select only files files with those extensions to do some work with them :

if [ -f $myregexp ]; then

  .....                                                                                       
fi

thanks.

Answer 1

Try this:

#!/bin/bash
# no case match 
shopt -s nocasematch
matchRegex='.*\.(tgz$)|(tar\.gz$)'
for f in *
do
    # display filtered files   
    [[ -f "$f" ]] && [[ "$f" =~ "$matchRegex"  ]] &&  echo "$f";

done